Charger with an energy storage element

ABSTRACT

A method includes connecting a limited power source to a charger having an energy storage element; charging the energy storage element with the limited power source at a first charging rate; connecting the charger to a wireless device having a remote energy storage device; and charging the remote energy storage device with power output from the energy storage element at a second charging rate that is higher rate than the first charging rate.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims the benefit of U.S. Patent Application No. 62/101,227 for a Charger with Storage Element filed on Jan. 8, 2015, which is hereby incorporated by reference in its entirety.

BACKGROUND

Wireless devices require energy storage in the form of batteries or large (super) capacitors, etc. to operate. Most wireless devices are rechargeable and require a certain amount of time to replenish the battery/capacitor before they can be used. In some cases, the power source used to recharge the device has limited power, such as a USB port. Limited power sources can limit a recharge rate of the wireless device, resulting in device down time.

SUMMARY

In one aspect of the invention, a method comprises connecting a limited power source to a charger having an energy storage element; charging the energy storage element with the limited power source at a first charging rate; connecting the charger to a wireless device having a remote energy storage device; and charging the remote energy storage device with power output from the energy storage element at a second charging rate that is higher rate than the first charging rate.

In an embodiment, the energy storage element is charged at the first charging rate by the limited power source prior to the energy storage element charging the remote energy storage device at the second charging rate.

In an embodiment, the energy storage element is a battery.

In another embodiment, the energy storage element is a super capacitor.

In an embodiment, the remote energy storage device is a battery.

In another embodiment, the remote energy storage device is a super capacitor.

In an embodiment, the limited power source is a USB connection, an AC wall adapter, or powered Ethernet connection.

In another embodiment, the limited power source is a USB connection.

In an embodiment, the method comprises the step of charging the remote energy storage device with power output from the limited power source when power output from the energy storage element has been exhausted.

In an embodiment, the charger includes a power source selection control controlling which power output charges the remote energy storage device.

In another aspect of the invention, a device charger comprises: a power connector connectable to a limited rate power source; an energy storage element electrically coupled to the limited rate power source through the power connector; and a charger connector coupled to the power connecter and the energy storage element.

In an embodiment, the energy storage element is a super capacitor.

In another embodiment, the energy storage element is a battery.

In an embodiment, the energy storage element is charged by the limited rate power source.

In an embodiment, the energy storage element has a power output that is greater than a power output of the limited rate power source.

In an embodiment, the device charger comprises a power source selection control connected to an output of the energy storage element, the limited rate power source, and to the charger connector.

In an embodiment, the power source selection control supplies power output from the energy storage element to the charger connector.

In another embodiment, the power source selection control supplies power from the limited rate power source to the charger connector when the energy storage element power supply is exhausted.

In an embodiment, the charger connector is an electrical connector having a complimentary shape to a power input connector on a wireless device.

In another embodiment, the charger connector includes a wireless charging station.

In an embodiment, the limited power source is a USB connection, an AC wall adapter, or powered Ethernet connection.

In another embodiment, the limited power source is a USB connection.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will now be described by way of example, with reference to the accompanying Figures, of which:

FIG. 1 is a schematic diagram of a charger having an energy storage element;

FIG. 2 is a schematic diagram of the charger connected to a wireless device having an energy storage device; and

FIG. 3 is a block diagram of a method of using a charger with an energy storage element.

DETAILED DESCRIPTION

In the following description, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration specific embodiments which may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that other embodiments may be utilized and that structural, logical, and electrical changes may be made without departing from the scope of the present invention. The following description of example embodiments is, therefore, not to be taken in a limited sense, and the scope of the present invention is defined by the appended claims.

As shown in an embodiment of FIG. 1, a device charger 1 has a power connector 10, an energy storage element 20, a charger connector 30, and a power source selection control 40. The device charger 1 can be a charging base, cradle, docking station, cable, or the like.

The power connector 10 is an electrical connector having a shape complimentary to a mating connector (not shown) connected to a limited rate power source. The power connector 10 connects with the mating connector (not shown), receiving power input from the limited rate power source. In an embodiment, the mating connector is a Universal Serial Bus (“USB”) connector, and the power connector 10 is a complimentary USB connector. In another embodiment, the mating connector is an AC wall adapter, and the power connector 10 is a complimentary AC connector, such as an AC barrel connector or other standard connector form. In yet another embodiment, the mating connector is a power Ethernet connector, and the power connector 10 is a complimentary power Ethernet connector. In an embodiment, the mating connector is a DC power connector, and the power connector 10 is a complimentary DC connector, such as a DC barrel connector or other standard connector form. In another embodiment, the power connector 10 is any type of connector known to those of ordinary skill in the art to provide a limited rate power source.

In an embodiment, the limited rate power source supplies power of 500 mA or less. In another embodiment, the limited rate power source supplies power of 500 mA-1 A. In another embodiment, the limited rate power source supplies power of 1 A-2 A. In yet another embodiment, the limited rate power source supplies power of 2 A or greater.

In the embodiments shown in FIGS. 1 and 2, the energy storage element 20 is an electrically rechargeable element. In an embodiment, the energy storage element 20 is an ultra- or super capacitor. In another embodiment, the energy storage element 20 is a battery, such as rechargeable nickel cadmium, lithium, or any other known rechargeable battery type.

In an embodiment, the energy storage element 20 has a power output that is greater than a power output of the limited rate power source. In another embodiment, the energy storage element 20 has a power output that is equal to or less than a power output of the limited rate power source.

In the embodiments shown in FIGS. 1 and 2, the charger connector 30 is any type of common electrical connectors. The charger connector 30 is connectable with a power input connector 130 of a wireless device 100, having a complimentary shape to the power input connector 130. In an embodiment, the wireless device 100 is an indicia scanner or other electronic device.

In the embodiments shown in FIGS. 1 and 2, the power source selection control 40 has a first power input 40 a, a second power input 40 b, and a charging output 40 c. The power source selection control 40 receives input power from two separate power sources via the first power input 40 a and second power input 40 b. The power source selection control 40 selectively controls which of the input power sources is output at the charging output 40 c based on predetermined parameters, such as power input levels. In an embodiment, the power source selection control 40 selectively outputs higher power to the charging output 40 c from either the first power input 40 a or the second power input 40 b, depending on which input 40 a,40 b is providing the greater power input level.

As shown in the embodiments of FIGS. 1 and 2, the scanner charge/power source selection control 40 receives input power from the energy storage element 20 via the first power input 40 a, and input power from the limited rate power source via the second power input 40 b. The power source selection control 40 selectively controls which source of input power is output at the charging output 40 c to the charger connector 30.

An input current regulated charge circuit 60 has a power input 60 a that receives power from the limited rate power source, and a power output 60 b that outputs power to the energy storage element 20. The input current regulated charge circuit 60 regulates the level of power delivered to the energy storage element 20 by imposing an upper limit on the level of power output at the power output 60 b.

An output DC/DC Converter and Charge Transfer Control 70 has a power input 70 a that receives power output from the energy storage element 20, and has a power output 70 b that outputs power from the energy storage element 20 to the first power input 40 a of the power source selection control 40. Those of ordinary skill in the art would appreciate that the output DC/DC converter and charge transfer control 70 can optionally step up or step down the voltage of the current, depending on the desired application, as well as clean up unfiltered current from the energy storage element 20 and output filtered current.

In an embodiment shown in FIG. 2, the wireless device 100 includes the power input connector 130 and an energy storage device 120. The power input connector 130 is electrically connected to the energy storage device 120 by a device power source input path 150. When the power input connector 130 is connected to the charger connector 30, the energy storage device 120 receives power from either the limited rate power source or the energy storage element 20 via the power source selection control 40. In an embodiment, the energy storage device 120 is a super- or ultra-capacitor. In another embodiment, the energy storage element 120 is a battery, such as rechargeable nickel cadmium, lithium, or any other known rechargeable battery type.

In an embodiment, where the energy storage device 120 is a capacitor, the wireless device 100 can further include a capacitor management and discharge regulator 160. The regulator 160 can perform a substantially similar function in the wireless device 100 as the Output DC/DC converter and charge transfer control 70 in the device charger 1.

The wireless device 100 can also include a power control 161 and various electronics 162 needed to perform scanning tasks, such as a scan engine and other scanner components known to those of ordinary skill in the art.

In the embodiments shown in FIGS. 1 and 2, the device charger 1 has an optional auxiliary charging connector 80.

Assembly of the various components of the charging device 1 will now be described in detail, with reference to the embodiments shown in FIGS. 1 and 2.

The power connector 10 is electrically connected to the energy storage element 20 through a first power source input path 50 a and a second power source input path 50 b. Thus, the energy storage element 20 is electrically coupled to the limited rate power source through the power connector 10. The first power source input path 50 a is connected to the power connector 10. The second power source input path 50 b is connected to the first power source input path 50 a and to the energy storage element 20. The first power source input path 50 a connects to the power connector 10 and to the second power input 40 b of the power source selection control 40.

In an embodiment shown in FIGS. 1 and 2, the charging device 1 has an optional direct charging path 61. The direct charging path 61 can either be connected directly to the power connector 10, or to the first power source input path 50 a, and extends to the optional auxiliary charging connector 80. The wireless device 100 can connect to the auxiliary charging connector 80 in a manner substantially similar to that shown in FIG. 2, and various components of the wireless device 100, such as the power control 161 or electronics 162, can be directly charged with power from the power connector 10.

In another embodiment shown in FIGS. 1 and 2, an optional voltage monitoring path 62 extends from the energy storage element 20 to a voltage monitoring input 40 d on the power source selection control 40. The power source selection control 40 can optionally monitor a power level of the energy storage element 20 via the voltage monitoring path 62. When the voltage of the energy storage element 20 drops below a predefined threshold, the power source selection control 40 can switch the power source of the charging output 40 c from the energy storage element 20 to the limited rate power source

In another embodiment shown in FIGS. 1 and 2, the first power source input path 50 a is connected to the power connector 10, and extends to other charging device loads 63, such as a processor, communication elements, etc.

In an embodiment, the second power source input path 50 b is connected to the first power source input path 50 a and to a power input 60 a of an input current regulated charge circuit 60. The energy storage element 20 is connected to the charging output 60 b of the input current regulated charge circuit 60 and power input 70 a of the charge transfer control 70 via a first connecting path 50 f. A second connecting path 50 g extends from the power output 70 b of the charge transfer control 70 to the first power input 40 a of the power source selection control 40. A final power output path 50 h extends from the charging output 40 c of the power source selection control 40 to the charger connector 30.

As shown in the embodiment of FIG. 2, the energy storage device 120 is connected to an input of the capacitor management and discharge regulator 160. The regulator 160 outputs power to a power input of the power control 161, which then outputs power to the various electronics 162 in the wireless device 162. In an embodiment not shown), when the energy storage device 120 is a rechargeable battery, the energy storage device 120 may optionally be connected directly to the power control 161 rather than through the regulator 160.

In principle, the energy storage element 20 is charged by the limited rate power source connected to the power connector 10. In other words, the energy storage element 20, such as a battery or super capacitor, is “trickle charged” by a limited rate of energy supplied to the device charger 1 from the limited rate power source while the wireless device 100 is in use and not being charged via the charger connector 30. When the wireless device 100 is placed on the charger 1 and the power input connector 130 is connected with the charging connector 30, the power source selection control 40 transfers energy from the energy storage element 20 in the device charger 1 to the energy storage device 120 in the wireless device 100. When the energy storage element 20 has been depleted or exhausted to a predetermined level, the power source selection control 40 switches the power source of the charging output 40 c to the limited rate power source. Thus, in an embodiment, the energy storage device 120 is firstly charged with power from the energy storage element 20, and then, after the energy storage element 20 has been depleted or exhausted to a predetermined level, the energy storage device 120 continues to be charged with the limited rate power source, albeit at a slower charging rate.

Since the energy storage element 20 has a greater power transfer rate than the limited rate power source, rapid charging of the energy storage device 120 is achieved at a faster rate than possible with the limited rate of energy transfer to the charger 1 from the limited rate power source. Rapid charging is especially advantageous when the energy storage device 120 in the wireless device 100 is a super capacitor, which often requires frequent recharging during normal operation. Thus, rapid charging from the energy storage element 20 can help to avoid product down time.

In an embodiment (not shown), the charger connector 30 is a wireless charging station, or is connected to a wireless charging station, and the power input connector 130 is a corresponding wireless charging component, or is connected to a corresponding wireless charging component. The energy storage element 20 provides power to the wireless charging station via the power source selection control 40 to permit wireless charging of the energy storage device 120 in the wireless device 100.

In an embodiment shown in FIG. 3, a method 300 for using the device charger 1 with an energy storage element 20 includes the steps of connecting a limited power source to the charger 1 having an energy storage element 20 at block 210; charging the energy storage element 20 with the limited power source at a first charging rate at block 220; connecting the charger 1 to the wireless device 100 having a remote energy storage device 120 at block 230; and charging the remote energy storage device 120 with power output from the energy storage element 20 at a second charging rate that is higher rate than the first charging rate at block 240.

In an embodiment, the energy storage element 20 is “trickle-charged” at the first charging rate by the limited power source prior to the energy storage element 20 charging the remote energy storage device 120 at the second charging rate.

In an embodiment, the method 300 includes the step of charging the remote energy storage device 120 with power output from the limited power source when power output from the energy storage element 20 has been exhausted at block 250.

Although a few embodiments have been described in detail above, those of ordinary skill in the art would appreciate that other modifications are possible. For example, the logic flows depicted in the Figures do not require the particular order shown, or sequential order, to achieve desirable results. Other steps may be provided, or steps may be eliminated, from the described flows, and other components may be added to, or removed from, the described systems. Other embodiments may be within the scope of the following claims.

To supplement the present disclosure, this application incorporates entirely by reference the following patents, patent application publications, and patent applications:

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What is claimed is:
 1. A method comprising: connecting a limited power source to a charger having an energy storage element; charging the energy storage element with the limited power source at a first charging rate; connecting the charger to a wireless device having a remote energy storage device; and charging the remote energy storage device with power output from the energy storage element at a second charging rate that is higher rate than the first charging rate.
 2. The method of claim 1, wherein the energy storage element is charged at the first charging rate by the limited power source prior to the energy storage element charging the remote energy storage device at the second charging rate.
 3. The method of claim 1, wherein the energy storage element is a battery.
 4. The method of claim 1, wherein the energy storage element is a super capacitor.
 5. The method of claim 1, wherein the remote energy storage device is a battery.
 6. The method of claim 1, wherein the remote energy storage device is a super capacitor.
 7. The method of claim 1, wherein the limited power source is a USB connection, an AC wall adapter, or powered Ethernet connection.
 8. The method of claim 1, wherein the limited power source is a USB connection.
 9. The method of claim 1, comprising charging the remote energy storage device with power output from the limited power source when power output from the energy storage element has been exhausted.
 10. The method of claim 9, wherein the charger includes a power source selection control controlling which power output charges the remote energy storage device.
 11. A device charger comprising: a power connector connectable to a limited rate power source; an energy storage element electrically coupled to the limited rate power source through the power connector; and a charger connector coupled to the power connecter and the energy storage element.
 12. The device of claim 11, wherein energy storage element is a super capacitor.
 13. The device of claim 11, wherein the energy storage element is a battery.
 14. The device of claim 11, wherein the energy storage element is charged by the limited rate power source.
 15. The device of claim 14, wherein the energy storage element has a power output that is greater than a power output of the limited rate power source.
 16. The device of claim 15, further comprising a power source selection control connected to an output of the energy storage element, the limited rate power source, and to the charger connector.
 17. The device of claim 16, wherein the power source selection control supplies power output from the energy storage element to the charger connector.
 18. The device of claim 17, wherein the power source selection control supplies power from the limited rate power source to the charger connector when the energy storage element power supply is exhausted.
 19. The device of claim 18, wherein the charger connector is an electrical connector having a complimentary shape to a power input connector on a wireless device.
 20. The device of claim 18, wherein the charger connector includes a wireless charging station.
 21. The device of claim 11, wherein the limited power source is a USB connection, an AC wall adapter, or powered Ethernet connection.
 22. The device of claim 11, wherein the limited power source is a USB connection. 